<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>交换两个变量值</title>
    <script>
        var temp
        var apple1 = '青苹果'
        var apple2 = '红苹果'
        temp = apple1
        apple1 = apple2
        apple2 = temp
        console.log(apple1)
        console.log(apple2)
    </script>
</head>
<body>
    
</body>
</html>